20602919 has 4 divisors (see below), whose sum is σ = 20683344. Its totient is φ = 20522496.

The previous prime is 20602913. The next prime is 20602927. The reversal of 20602919 is 91920602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91920602 = 2 ⋅45960301.

It is a cyclic number.

It is not a de Polignac number, because 20602919 - 2⁸ = 20602663 is a prime.

It is a super-2 number, since 2×20602919² = 848960542641122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20602891 and 20602900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39827 + ... + 40340.

It is an arithmetic number, because the mean of its divisors is an integer number (5170836).

Almost surely, 2^20602919 is an apocalyptic number.

20602919 is a deficient number, since it is larger than the sum of its proper divisors (80425).

20602919 is an equidigital number, since it uses as much as digits as its factorization.

20602919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80424.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20602919 is about 4539.0438420443. The cubic root of 20602919 is about 274.1424259981.

The spelling of 20602919 in words is "twenty million, six hundred two thousand, nine hundred nineteen".